Control of Fusarium and Verticillium Wilts while Potato Growing

Fusarium wilt potato disease is ossurd by different Fusarium spp.
Verticillium wilt is caused by the fungi Verticillium alboatrum and V. dahliae.
These fungi attack a wide range of plant species, including cultivated potatoes crops and weeds. They are soil borne in field and greenhouse soils where they can persist for many years.
Although disease is retarded by the higher temperatures that favor Fusarium wilt, visible symptoms may appear to be more severe when high temperatures exist, due to restricted water movement in the plant brought about by damage done to the water conducting vessels earlier in the growing season.

Fusarium and Verticillium fungi are widespread potatoes diseases and persist several years in soil.
To reduce populations of these fungi is necessary a long crop rotation (4 to 6 years).

Avoid using any solanaceous crop (potato, tomato, pepper, eggplant) in the rotation. In case of Verticillium wilt also avoids the use of strawberries and raspberries, which are highly susceptible.
Rotate with cereals and grasses wherever possible.
It is important to keep rotational crops weed-free. As there are many weeds hosts of Verticillium.

Whenever practical, remove and destroy infested potato plant material after harvest.
Maintain a high level of plant vigour with appropriate fertilization and irrigation, but do not over-irrigate, especially early in the season.
If soils are severely infested, production of potatoes crops may not be possible unless soil fumigation is an option.

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